Verification of the dosimetric properties of a new scintillation detector: Exradin W1

Abstract

The purpose of this work is to verify the properties of a new scintillation detector. The Exradin W1 Scintillator of Standard Imaging is a plastic scintillating fiber detector designed to dosimetry for megavoltage beams in radiotherapy. Its most important documented characteristics are: high spatial resolution, near water equivalence, angular independence, temperature independence and energy independence (within the MeV range).

Different measurements were performed for 6 MV and 15 MV photon beams in an ONCOR Impression Plus linac (Siemens Medical Solutions). Percentage depth dose, output factors and dose delivered to a point in intensity modulated radiation therapy treatment plan were analyzed and compared with ionization chamber and diode measurements. As a result we found that scintillator performance is similar to other detectors. In conclusion, the Exradin W1 can be used in dosimetry as a high spatial resolution detector.